-
The method of magnetisation is:
-
- hammering a magnet
- heating a magnet
- passing direct current through it
- passing alternating current through it
- hammering a magnet
Correct Option: A
Hammering a rod will either allow it to become slightly magnetic if laid along a magnetic field (i.e.North - South) or demagnetise it if laid across the field lines (i.e. East-West). A current passing through a coil will produce a magnetic field.
